Writing instrument



FIG. 1 is a left side elevational view of a writing instrument showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a cross-sectional view thereof, taken in the direction of arrows 6—6 in FIG. 2:

FIG. 7 is a front elevational view of the body thereof, with the cap members removed for ease of illustration;

FIG. 8 is a bottom plan view on an enlarged scale; and,

FIG. 9 is a top plan view on an enlarged scale. 

The ornamental design for a writing instrument, as shown and described. 